Barometer-setting means



Jung :4; 1927.

P. R. JAMESON BAROMETER SETTING MEAN 5 Filed Dec 5, 1925\ Zlwuem f we. Pergy i5. (hr/[1290a [is allmnevy PITQW Q l l riovs l is of simple construction, manufacture and ing an operating nations of parts, all

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' companies, on noonnsrnza, tnwYortK," A oonrona'rro'n or p restaurateu ii'eceititr The present invention relates to barometer ttin H -a s was it its L iat. m e

rat

foul-e 1 $9 sta e improved means for setting the reference index of anfaner oi barpmtter; or oth r A u her Qbit i setting indicating instrument. ofthe inyent on is to means for the handsjor pointers of indicating instruments,

the use behind= s esa arly of p'artif l ii. l trans parent.

in which the hands e a d 51 1191 9 1 3 1 axially, on arhorjorspindle, as ordinarily employed in ting means baroriieters, the improved setbeing adapted to avoid extendconnection from the reference pointer through the transparent cover.

A further object of the provide improved setting hands or pointers of pressure invention is to means for the controlled or other types of indicating instruments which economical to convenient to operate.

To these and other ends the invention re sides in certain improvements and combi as more fully described, the

' a Q pointed out in theclaims specification.

In the draw1ngs:- Figure 1 1s a will be hereinafter novel features being at the end of the front elevational View part-- ly in section illustrating more or less diagrammatically one embodiment of the in- ,vention; and

Fi ure 2 is a sectional elevation taken cen trally through the instrument shown in Fig ure 1,

Similar reference numerals throughout the several views indicate the same parts.

The present invention, while shown in connection with an adaptable for use with other scientific ind'i eating instruments,

aneroid barometer, is

particularly of the class having apointer or index adapted to travel over a dial, scale plate or chart and with which is associated a reference pointer or index arranged to be set or coincide with any tionary so as to indicate point or extent of movement for a given by hand to register the indicating pointer at time desired and adapted to remain-stathe initial starting time of theautomaticallycontrolled index, which may be a temperature or pressure controlled index.-

therewith Y sponsive movement thereof to the shaft 1 1,

m YO K-,

is therefor has been extended through tl ing of a hole inthe glassuwhich renders it nausea fracture sea which weakens it and adds Cassius-ably to the cost "of manufac ture through Jreakage of a n umbei' of the as ess aaueg theIdrillingoperationsL one object oftlie present inventionis to a'yoid the objectionable features pointed out above so] constructing andapplying theadj 'i'st 111g meansfo'r' the reference indexes to avoid drilling or perforating the glass for instruments of the class described, and also ;,o F1cE,

ssumemamamssmfi sense I reference aide the i i to avoid rotating the dial or scale plate as is donein a number of such instruments.

The present invention, shown by way of i illustration in connection with an aneroid v barometer of the usual and well known construotion including a casing 10 of any suit-- able design having a glass or transparent cover plate 11 secured by a bezel 12 in the usual manner, a scale plate or dial 12 which is suitably held within the casing and may be provided with any desired form of pressure scale or a purpose intended, an index pointer 13 mounted in front of thescale plate on an arbor or spindle 14 projecting forwardly through the scale plate and rotatably supported in'the usual manner preferably by an arm or suitable support 15 fixed ber 16 which is suitably connected with the casing. For the sake of clearness the constructional details for supporting the spindle 14 on the bracket support 15 as also the aneroid box and the mechanism connected for translating the pressure-rehave been omitted.

The reference index or pointer 17 is rotatably supported and ispreferably carried thereby through the medium of a wheel or pulley 18 or other suitable member rotatable thereon with which the reference pointer is connected in any desired manner. The casing at any convenientpoint thereof is slotted to receive a knurled thumb nut 19 or disk-like member adapted to project slightly through the wall of the casing, as indicated in Figure 2. The thumb nut is rigidly mounted on a spindle 2O rotatably supported by a lug or bracket 21 suitably securedwithin the cas raduations suitable for the on a stud or like memcoaxially with the spindle 14 v ing. Connected with the spindle or thumb nut is a wheel or pulley 22 which is operatively connected with the pulley 18 preterably through the medium of a belt 23 of any well known type, such as a flexible band or ribbon or a steel chain if desired. With this arrangement the setting of the reference index 17 to bring it into coincidence with the automatically actuated pointer 13 is easily efl'ected by rotating the nut 19 with the thumb or finger as desired, whereby the belt 23 is driven to actuate the pulley 18 and the pointer 17 thereon.

I claim as my invention:

1. In apparatus of the character described, the combination with a casing having an opening in its wall and containing enclosed therein a scale, a spindle carrying an index co-operating with the scale and operating mechanism for driving the spindle, of an auxiliary index, a pulley revolubly mounted on the spindle and supporting the auxiliary index, and means for moving the pulley about the spindle, including a second pulley mounted within the casing in alignment with the other pulley, an endless band interconnecting the two pulleys and a circular memher having a portion exposed through the said opening in the casing, said circular member being operatively connected to thc second pulley for turning the same.

2. In a barometer, the combination of a casing having an opening in its wall and a scale plate carried by the casing, a spindle rotatable within the casing and having an index rotatable adjacent the scale plate, a pulley upon the spindle, an index carried by the pulley between the first mentioned index and scale plate, a disk-like member rotatable within the casing and adapted to project through said opening in the wall thereof. a pulley connected with the disk-like member and a belt connecting said pulleys.

PERCY R. JAMESON. 

